But most clauses have more than two parts：
The first noun phrase is the subject of the sentence：
The children laughed.
John wanted a new bicycle.
All the girls are learning English.
She put the flowers in the vase.
English clauses always have a subject：
His father has just retired. Was a teacher. He was a teacher.
I’m waiting for my wife. She is late.
… except for the imperative which is used to give orders：
… and for “soft imperatives” like invitations and requests：
Please come to dinner tomorrow.
Play it again please.
If we have no other subject we use “there” or “it” as subject. We call this a“dummy subject”：
如果没有其他主语，我们用there 或it 作为形式主语。
There were twenty people at the meeting..
There will be an eclipse of the moon tonight.
It’s a lovely day.
It’s nearly one o’clock.
I have toothache. It hurts a lot.